Switch from maven to gradle.

backend/codiki-application/build.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    id("io.spring.dependency-management") version "1.1.7"
+}
+
+dependencies {
+    implementation(project(":codiki-domain"))
+    implementation("org.springframework:spring-context")
+    implementation("org.springframework.boot:spring-boot-starter-security")
+    implementation("com.auth0:java-jwt:4.5.0")
+    implementation("org.apache.commons:commons-lang3") //:3.18.0
+}